Email Verifier MCP Server

by noahsarch Your server? Claim it

answering

Email Verifier is answering right now. Last checked 5 min ago. It exposes 5 tools.

Verify emails: syntax, MX, disposable, role, typo fix, optional SMTP probe, SPF/DMARC.

Uptime history 15 hours of history

15 hours agonow

100.0%

Uptime 24h

56 of 56 checks

Tools

read from the server

356 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Email Verifier every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email-verifier --transport http https://verify.noahsarch.tech/mcp

Settings → Connectors → Add custom connector, then paste this address

https://verify.noahsarch.tech/mcp

~/.codex/config.toml

[mcp_servers.email-verifier]
url = "https://verify.noahsarch.tech/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "email-verifier": {
      "url": "https://verify.noahsarch.tech/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "email-verifier": {
      "type": "http",
      "url": "https://verify.noahsarch.tech/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

verify

verify_email

Full check of one address: RFC syntax and normalisation, domain existence and MX records (incl. null-MX and implicit-MX), disposable-provider list (10k+ domains), role account, free-mail provider, typo suggestion; optional SMTP RCPT probe with catch-all detection and optional SPF/DMARC. Example: email '[email protected]', smtp_check false. Response: result with status (deliverable | risky | undeliverable | invalid | unknown), reason, score 0–100, the checks run, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. No logging of addresses.

verify_emails

Same checks as verify_email for a list, run in parallel with per-domain DNS caching; returns per-address results, a summary by status, and `clean` (the deliverable ones). Charged per unique address. Example: emails ['[email protected]','[email protected]'], smtp_check false. Response: result with status (deliverable | risky | undeliverable | invalid | unknown), reason, score 0–100, the checks run, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. No logging of addresses.

domain

domain_check

Does the domain accept mail, which MX hosts, is it a disposable or free-mail provider, does it publish SPF and DMARC (and the DMARC policy)? Use before trusting a sender domain or when onboarding a company. Example: domain 'noahsarch.tech'. Response: result with status (deliverable | risky | undeliverable | invalid | unknown), reason, score 0–100, the checks run, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. No logging of addresses.

extract

extract_emails

Find every address in a block of text or HTML (deduped by default). Free. Pair with verify_emails. Response: result with status (deliverable | risky | undeliverable | invalid | unknown), reason, score 0–100, the checks run, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. No logging of addresses.

suggest

suggest_fix

Fix common typos: gmial.com, hotmail.con, yaho.com, stray spaces/dots. Returns the suggestion (or null) and which fixes applied. Free. Example: email '[email protected]'. Response: result with status (deliverable | risky | undeliverable | invalid | unknown), reason, score 0–100, the checks run, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. No logging of addresses.

Endpoints

URL	Transport	State	Latency	Checked
https://verify.noahsarch.tech/mcp	streamable-http	answering	323 ms	5 min ago

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Email Verifier — questions

Answers built from our own checks of this server.

What can Email Verifier do?

It exposes 5 tools, read directly from the server on our last check. Among them: domain_check, extract_emails, suggest_fix, verify_email, verify_emails. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Email Verifier working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 56 of 56 checks got a reply (100.0%), average response time 356 ms. The bar chart above shows every period we have measured.

How do I connect Email Verifier?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Email Verifier need an API key?

No. Email Verifier completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Email Verifier?

It answers our handshake in 356 ms on average, which is faster than 37% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.